Eunice barvicensis McIntosh 1885

Eunice barvicensis McIntosh, 1885

Eunice barvicensis McIntosh, 1885:292–294, figs. 52, 53, pl. 39: fig. 12, pl. 21A: figs. 1–3.

MATERIAL EXAMINED.—One syntype, BM(NH) ZK 1885.12.1.203a, Bermuda, between tidemarks, June 1873.

DESCRIPTION.—Syntype incomplete with 112 setigers; length 41 mm; maximal width 3.5 mm at setiger 10. Length through setiger 10, 6 mm. Syntype frontally dissected, at one time desiccated. Body apparently cylindrical, anteriorly truncate.

Prostomium (Figure 18b) distinctly shorter than peristomium, about as wide as peristomium, less than as deep as peristomium. Prostomial lobes large, frontally rounded, dorsally flattened; median groove deep. Eyes large, lensed, between bases of A-I and A-II. Antennae poorly preserved, in a horseshoe, evenly spaced, similar in thickness. Ceratophores long in all antennae, without articulations. Ceratostyles tapering, apparently not articulated (but see McIntosh, 1885:292–293). A-I to posterior margin of peristomium; A-II to setiger 1; A-III to setiger 3. Peristomium short, tapering towards anterior end (artefact?); anterior ring ~ of total peristomial length. Separation between rings distinct dorsally and ventrally. Peristomial cirri to front edge of peristomium, tapering, without articulations.

Jaws present in vial. Maxillary formula 1+1, 5+5, 5+0, 5+8, 1+1. Mx III very short and forming distal arc with left Mx IV and V. Only 3 teeth on left Mx IV well developed; others low tubercles.

Branchiae present, pectinate, about as long as notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 6 to setiger 65, terminating well before the posterior end. First 3 and last 10 pairs single filaments; maximum 4 filaments at setigers 25–30. Branchial stems short, tapering. Filaments shorter than notopodial cirri, short, flattened.

Anterior neuropodial acicular lobes symmetrically rounded, becoming distinctly conical by setiger 60; aciculae emerging at midline. Pre- and postsetal lobes low folds. Ventral cirri digitiform through setiger 4. Ventral cirri basally inflated from setiger 5 through about setiger 25. Inflated bases ovate; narrow tips digitiform. Posterior ventral cirri without basal inflation, digitiform. All notopodial cirri digitiform, without articulations. Far posterior notopodial and ventral cirri similar in shape and size.

Limbate setae present. Up to 10 pectinate setae in a parapodium in posterior setigers. Shafts of pectinate setae slender, cylindrical; blades flat, flared. Both marginal teeth longer than other teeth; number of teeth 15. Shafts of compound falcigers (Figure 18d) distally inflated, without serrations; distal beak distinct. Appendages short, tapering; head large, bidentate. Proximal teeth triangular with narrow base, directed laterally; distal teeth as large as proximal teeth, tapering, directed laterally. Guards symmetrically bluntly pointed, marginally serrated; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae single in anterior and posterior parapodia, paired in median parapodia, light brown in anterior and posterior setigers, dark brown in median setigers, pointed, straight; cross-sections round. Subacicular hooks (Figure 18c) with dark brown cores and clear sheaths, bidentate. Hooks first present from setiger 19, present in all setigers thereafter, paired in some setigers. Hooks distinctly bent distally, with narrow necks and large heads. Proximal teeth larger than distal teeth, directed laterally, distally slightly upturned; distal teeth sharply pointed, directed distally.

UKNOWN MORPHOLOGICAL FEATURES.—Features associated with pygidium, anal cirri, and far posterior setigers.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 1, 2, 38.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.